drm/xe/display: Implement display support

As for display, the intent is to share the display code with the i915
driver so that there is maximum reuse there.

We do this by recompiling i915/display code twice.
Now that i915 has been adapted to support the Xe build, we can add
the xe/display support.

This initial work is a collaboration of many people and unfortunately
this squashed patch won't fully honor the proper credits.
But let's try to add a few from the squashed patches:

Co-developed-by: Matthew Brost <matthew.brost@intel.com>
Co-developed-by: Jani Nikula <jani.nikula@intel.com>
Co-developed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Co-developed-by: Matt Roper <matthew.d.roper@intel.com>
Co-developed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Co-developed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Co-developed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/gpu/drm/xe/compat-i915-headers/i915_config.h b/drivers/gpu/drm/xe/compat-i915-headers/i915_config.h
new file mode 100644
index 000000000000..e835bea08d1b
--- /dev/null
+++ b/drivers/gpu/drm/xe/compat-i915-headers/i915_config.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2023 Intel Corporation
+ */
+
+#ifndef __I915_CONFIG_H__
+#define __I915_CONFIG_H__
+
+#include <linux/sched.h>
+
+struct drm_i915_private;
+
+static inline unsigned long
+i915_fence_timeout(const struct drm_i915_private *i915)
+{
+	return MAX_SCHEDULE_TIMEOUT;
+}
+
+#endif /* __I915_CONFIG_H__ */